轴向柱塞泵空化时气相动态演进过程及影响

doi:10.3969/j.issn.1000-1093.2015.03.026

兵工学报 ›› 2015, Vol. 36 ›› Issue (3): 559-565.doi: 10.3969/j.issn.1000-1093.2015.03.026

轴向柱塞泵空化时气相动态演进过程及影响

苑士华，周俊杰，罗先伟，荆崇波

（北京理工大学机械与车辆学院，北京 100081）

收稿日期:2014-06-19 修回日期:2014-06-19 上线日期:2015-05-01
作者简介:苑士华(1958—)，男，教授，博士生导师
基金资助:
国家自然科学基金项目（51175039）；国家部委创新计划项目（VTDT-3103）

Dynamic Evolution and Effects of Gas Phase in Cavitation of Axial Piston Pump

YUAN Shi-hua, ZHOU Jun-jie, LUO Xian-wei, JING Chong-bo

(School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China)

Received:2014-06-19 Revised:2014-06-19 Online:2015-05-01

摘要/Abstract

摘要： 针对轴向柱塞泵在工作过程可能出现的空化现象进行研究。目前使用的稳态流体模型在计算流体属性（密度和体积弹性模量）时没有考虑气体演进的动态特征。针对此问题，提出一种动态流体模型，该模型考虑液压油中气体（空气）的动态演进过程，包括气体的产生、消解以及在不同控制体积之间的输运和分布。应用此模型到轴向柱塞泵的压力流量特性仿真中，分析了气体影响泵特性的内在机理。分析结果表明：稳态流体模型会低估空化对泵出口流量和压力的影响，而动态流体模型从本质上揭示了空化时泵出口流量压力脉动的增加以及平均流量的降低是因为气相对流体可压缩性的改变。

关键词: 兵器科学与技术, 空化, 气体演进, 轴向柱塞泵, 体积弹性模量, 流体属性

Abstract: A problem of gas cavitation existing in the operation of axial piston pump is addressed. The current models of evaluating the fluid properties (density, bulk modulus) commonly used in lumped parameter pump models do not consider the dynamic characteristics of gas cavitation. For this reason, a novel cavitation model which accounts for the dynamic characteristics of gas (free air and vapor), including gas evolution, and transport and distribution of gas between connected control volumes, is proposed. The model is integrated in a lumped parameter axial piston pump model, and the cavitation effects are investigated. The simulated results show that the proposed method has an advantage over the classic fluid models which tend to underestimate the effect of cavitation on the outlet flow and pressure of pump. The increase in outlet flow or pressure oscillation and the reduction in average flow rate in cavitating pump are due to the change of fluid compressibility induced by air release.

Key words: ordnance science and technology, cavitation, gas evolution, axial piston pump, bulk modulus, fluid property

中图分类号:

TH322

苑士华，周俊杰，罗先伟，荆崇波. 轴向柱塞泵空化时气相动态演进过程及影响[J]. 兵工学报, 2015, 36(3): 559-565.

YUAN Shi-hua, ZHOU Jun-jie, LUO Xian-wei, JING Chong-bo. Dynamic Evolution and Effects of Gas Phase in Cavitation of Axial Piston Pump[J]. Acta Armamentarii, 2015, 36(3): 559-565.

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轴向柱塞泵空化时气相动态演进过程及影响

Dynamic Evolution and Effects of Gas Phase in Cavitation of Axial Piston Pump

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